It dates from the eighth century and still bears the mark on its upper rim of local man John Touhy's
turf spade who found it near Moylough, Co Sligo, in the 1940s.
After its removal, the rich peat underneath, which appeared like a moist chocolate cake, could be cut into with the
turf spade. These spades looked similar to a regular spade, but were long, thin and flat with a metal fin at a right angle at the base.